Anchoring means for superheaters



L. B. NUTTINGQ ANCHORING MEANS FOR SUPERHEATERS.

APPLICATION FILED 050.11.1915.

"1 ,3 1 3, 326 Patented Aug. 19, 1919.

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UNITED STATES P T NT OFFICE.

LOUIS B. NUTTING, or PELHA-M, NEW YORK, nssrenoa'ro Pow'rm srncmn'rr COMPANY, on NEW YORK, N. Y., A conroanrron on NEW YORK.

ANCHORING MEANS FOR SUPER-HEATERS;

Specification of Letters Patent.

Application-filed December 11.1915. Serial as. 66,268.

To all whom it may concern:

Be it known that I, LOUIS B. NU r'rING, a citizen of the United States, residing at Pelham, county of Westchester, and State of New York, have invented certain new and useful Improvements in Anchoring Means for Superheaters,ofwhichthe following is a full, clear, and exact description.

The invention which constitutes the subject matter of this application relates broadly to' means for anchoring superheater units. The invention is particularly adapted for use in locomotive superheaters in which the superheater elements extend longitudinally in the fire flues. In such cases, the shocks incident to sudden stops and starts, coupling the cars, etc., are so severe that there is a tendency for the units to be broken or for the units to loosen their connection with the header and thereby cause leakage. Means are accordingly provided to prevent any displacement of the units and to prevent shocks being trans mitted to the junction of the superheater units with the header. The superheater units are, however, so secured that they may be easily removed from the fiues.

In a superheaterof the type illustrated, suitable means are employed for properly spacing and supporting the superheater elements within the fire tubes. These supporting means or feet rest directly upon the lower side of the fire tubes andthe movement ofthe elements with respect to the tubes, due to extraneous vibrations, results in the feet ultimately wearing or: cutting into the fire tubes. Thisobjection, which is a; serious'one, is entirely overcome with my invention, as the means employed to prevent displacement of the units also possesses the additional function of preventing the super-' heater element supports from cutting the fire tubes.

In the drawings:

Figure 1 illustrates alongitudinal sec-. tion of a portion of a locomotive or other boiler, showing a-nest of superheating. units I projecting rearwardly into a plurality of boiler fines.

Fig. 2 illustrates an end elevation of the boiler, showing the superheating elements and the means for anchoring said elements to prevent their longitudinal displacement and damage by shocks.

Fig. 3 is an enlarged detail View of the hook bolt, which secures the superheating, elements in longitudinal position;

Inmore detail,'in the drawings, the referg ence character 10 designates a conventional form of header to which is connecteda num ber of superheating units 11. These units 11 are detachably connectedto' the header, preferably by expanding the end of" the unit in the header. The units extend downwardly andthen rearwardly into enlarged lines 12. The portion of the superheater unit or tube extending rearwardly into the flues is, for example, in the form of a coilhaving return bends at 13. The front ends of the fines are supported by the'usual tube sheet 14.

My novel-means for anchoring the units against longitudinal displacement to' pre-v vent strains occurring at the juncture of the unit and the header and to avoid the superheater unit supports from cutting the fines, I will now proceed'to. describe.

The stay bars 15 preferably extend across the boiler adjacent to the tube sheet and are secured to the shell 16' by bolts or rivets; There is one of these stay bars for each row of fire tubes, and the bars are located slightly rearward and above the return bends 13 of the superheating elements. Ad-. jacent to each fire tube a hook bolt 18' engages the stay bar; This hook bolt extends forwardly over; and projects be yond the .edge' of the stay bar, as shown in Fig'. 3. Welded to eachof the. superheating units at a point adjacent. it, each return bend is a lug 19'. .In the construction illustrated, this lugextends upwardly and is bent to engage the hook bolt, as shown in Fig. 3. The end'of the hook bolt 18 is threaded to receive nuts 21; After the lugs are in position over" the hook bolts; these nuts are tightened" to draw the hook bolt into engagement With the stay bar and also to draw the lug 19 into contact with said bar. The second nut constitutes a lock nut.

Patented Aug. 19,. 19191 The aboye mentioned structure holds the I the fines and to properly space the elements, I provide the usual supporting blocks 23 and distance pieces 24. These are preferably sharpened at the ends to ofi'er as little resistance as possible to the flow of gases and in the withdrawal of the elements from the flue.

The above description and the accompanying drawing relates to one embodiment only of my invention. It is to be understood, however, that I do not limit myself to the exact construction shown and described as many changes may be made in point of detail and other embodiments and arrangements resorted to without necessarily deviating from the true spirit and scope of my invention.

l/Vhat I claim is:

1. Asuperheater having superheater units adapted to project rearwardly into the boiler flues, in combination with means for relieving said units from the strains incident to vibrations and shocks, said means comprising independently secured stay members and connections between said members and the superheating elements.

2. A superheater comprising, in combination, a header; superheater units having inlet and outlet portions connected thereto and a portion projecting rearwardly into flues, means for preventing strains at the connection of the units and header, said means comprising independent stay members extending transversely of the units, and

* removable connecting elements between the superheating units and the stay members.

3. In a superheater, a header, and superheater units connected thereto and project ing rearwardly into fire tubes, in combina tion with means for preventing strains at the connection of the superheating units and said header, the said strains being incident to vibrations and shocks, the said means comprising a plurality of stay members, a plurality of lugs welded to the aforesaid units and extending adjacent to said stay members, and means for connecting said stay members to said lugs.

4. A superheater comprising, in combination, a header, superheating units expanded therein and projecting downwardly and rearwardly into fire tubes, means for removing from the juncture of the header and the units the stresses incident to vibration and shocks, said means comprising a plurality of stay members, a plurality of lugs welded to the aforesaid units and extending adjacent to Said stay members, and connecting means between said lugs and stay members.

5. A superheater comprising superheater units projecting rearwardly into the boiler flues, in combination with means in the fines for supporting said units, and means for preventing vibrations of said units to prevent the superheater unit supports from cutting into the fines.

6. A superheater comprising headers, and superheater units connected to said headers and projecting rearwardly into the boiler flues, in combination with means in said flues for supporting said units, and means for preventing the superheater unit sup ports from cutting said flues, and for pre- Venting strains upon said units, comprising independently secured stay members connected to said superheating elements.

7 In combination with a boiler, of a su perheater, comprising a header located in the smoke-box, and superheater units having perforated lugs and projecting rear- Wardly into a plurality of fire tubes, the ends of said units being expanded into said header, in combination with means for rigidly anchoring said units, comprising cross bars secured to the interior of the smokebox and provided with projecting bolts thereon, and means for securing the said bolts to the said lugs.

8. In combination with a boiler, a superheater comprising a transverse or extension header located in and supported by the walls of the smoke box, and superheater units having perforated lugs and projecting rearwardly into a plurality of fire tubes, the ends of said units being expanded into said header, in combination with means for rigidly anchoring said units comprising a plurality of cross-bars secured to the interior of said smoke box and each rovided with a plurality of bolts arranged substan tially parallel to the longitudinal axis of said boiler, and means for securing said bolts to said lugs.

In testimony whereof I hereunto affix my signature.

LOUIS B. NUTTING. Witnesses:

WV. E. Down, Jr., FRANK PAGE.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). G. n 

